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1.
Apunts, Med. esport (Internet) ; 55(206): 71-79, abr.-jun. 2020. tab
Artigo em Inglês | IBECS | ID: ibc-191746

RESUMO

In order to better understand the possible relationships between the application of training loads and the risk of injury in professional women's basketball, four parameters from a professional women's basketball team (N = 11) were analysed: exposure time, number of injuries, rate of perceived exertion (RPE), and workload (sRPE). A total of 3182h of exposure were registered, 2774 were training hours, and 408 were game hours with a total of 9 time loss injuries. The data obtained from each player was related to the exposure time, injury risk, perception of effort, and workload. Several differences were observed between the injury risk values and the morning RPE (F = 5.0811; p = .032), the sRPE of the morning practices (F = 7.3585; p = .010) and the total time of exposure (F = 3.5055; p=.064). There is also a significant negative relationship between total training time and the number of time-loss (TL) injuries (rho = - .797; p = .003), as well as a possible association between exposure time and a lower risk of TL injury (R2 = .645). These findings suggest that an increase in specific exposure time could be associated with a decrease in the risk of time-loss injuries


Con el objetivo de entender mejor las posibles relaciones entre la aplicación de cargas de entrenamiento y el riesgo de lesión en el baloncesto femenino profesional, se analizaron 4 parámetros de un equipo de baloncesto femenino profesional (N = 11): tiempo de exposición, número de lesiones, percepción del esfuerzo después de las sesiones entrenamiento (RPE) y carga de entrenamiento (sRPE). Se registraron 3.182 horas de exposición totales, de las cuales 2.774 fueron de entrenamiento y 408h de competición con un total de 9 lesiones "time-loss" (TL) que comportaron tiempo de actividad perdido. Se relacionan los datos obtenidos de cada jugadora relativos a tiempo de exposición, lesiones, percepción del esfuerzo y carga de trabajo. Se observan posibles diferencias entre los valores de lesionabilidad y RPE de las sesiones de entrenamiento de la mañana (F = 5,0811; p = 0,032), el sRPE de la mañana (F = 7,3585: p = 0,010) y el tiempo total de exposición (F = 3,5055; p = 0,064). Se observa también una relación significativa negativa entre tiempo total de entrenamiento y el número de lesiones TL (rho = -0,797; p = 0,003), así como una posible asociación entre el tiempo de exposición y una menor incidencia lesional TL (R2 = 0,645). Estos valores sugieren que un aumento del tiempo de exposición de carácter específico podría vincularse a la disminución del riesgo de lesiones "time-loss"


Assuntos
Humanos , Feminino , Basquetebol/fisiologia , Esforço Físico , Fatores de Risco , Exercício Físico/fisiologia , Análise de Variância , Modelos Lineares
2.
Arch Osteoporos ; 15(1): 64, 2020 04 25.
Artigo em Inglês | MEDLINE | ID: mdl-32335776

RESUMO

This study investigated the impact and non-impact sports on bone mineral density accrual in adolescents over 18 months. The impact sports were beneficial for bone health (accrual of bone density). In contrast, swimmers had similar or lower bone mineral density compared with the control group depending on the skeletal site. PURPOSE: To investigate the impact and non-impact sports on bone mineral density (BMD) accrual in adolescents over a period of 18 months METHODS: The sample was composed of 71 adolescents, avarage age of 12.7 (± 1.7) years old at baseline. Bone outcomes were compared according to the loading of the sports practiced (impact sports, n = 33 [basketball, karate, and judo], non-impact sport, n = 18 [swimming], and control group, n = 20). Areal bone mineral density (aBMD) was measured by dual-energy X-ray absorptiometry (DXA) and bone mineral apparent density (BMAD) estimated through equation. The results were compared between the groups using analysis of variance and analysis of covariance. RESULTS: Adjusted aBMD at lower limbs, whole body less head (WBLH), and adjusted WBLH BMAD were significantly greater in the impact sport group than the non-impact sport group at all time points. Adjusted upper limbs aBMD was significantly higher at the impact sports group compared to the non-impact sport group at 9 months and 18 months, besides compared to the control group at baseline and 18 months. Non-impact sport group presented a significant lower adjusted aBMD compared with control group at lower limbs and WBLH at 9 months, and at 9 months and 18 months in WBLH BMAD. There was a significant interaction (time × sport group) at upper limbs (p = 0.042) and WBLH aBMD (p = 0.006), and WBLH BMAD (p < 0.001). CONCLUSION: Impact sports were more beneficial on accumulating aBMD and BMAD over a period of 18 months, while non-impact group (swimmers) had similar and lower aBMD and BMAD compared with the control group.


Assuntos
Desenvolvimento do Adolescente/fisiologia , Basquetebol/fisiologia , Desenvolvimento Ósseo/fisiologia , Artes Marciais/fisiologia , Natação/fisiologia , Absorciometria de Fóton/métodos , Adolescente , Análise de Variância , Densidade Óssea , Criança , Feminino , Humanos , Extremidade Inferior/diagnóstico por imagem , Masculino , Fatores de Tempo , Extremidade Superior/diagnóstico por imagem
3.
Int J Sports Physiol Perform ; 15(5): 603-616, 2020 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-32294618

RESUMO

PURPOSE: To systematically quantify the external and internal workloads reported during games-based drills in basketball and identify the effects of different modifiable factors on the workloads encountered. METHODS: PubMed, Scopus, MEDLINE, and SPORTDiscus databases were searched for original research published up until January 2, 2019. The search included terms relevant to workload, games-based drills, and basketball. Studies were screened using predefined selection criteria, and methodological quality was assessed prior to data extraction. RESULTS: The electronic search yielded 8,284 studies with 3,411 duplicates. A total of 17 studies met the inclusion criteria for this review, with quality scores ranging from 9 to 10 out of 11. Factors regularly modified during games-based drills among the included studies were team size, playing area, playing and rest time, and game alterations. Games-based drills containing smaller team sizes elicited greater external and internal workloads compared to larger team sizes. Furthermore, full-court games-based drills elicited greater external and internal workloads compared to half-court drills, while continuous games-based drills elicited greater internal workloads compared to intermittent drills. CONCLUSIONS: This review provides a comprehensive collation of data indicating the external and internal workloads reported during different games-based drills in various samples of basketball players. Furthermore, evidence is provided for basketball coaches to consider when prescribing games-based drills and modifying factors during drills across the season. Current literature suggests that smaller team sizes and full-court playing areas elicit greater external and internal workloads than larger team sizes and half-court drills, respectively. Furthermore, continuous games-based drills elicit greater internal workloads than intermittent drills.


Assuntos
Basquetebol/fisiologia , Esforço Físico/fisiologia , Frequência Cardíaca/fisiologia , Humanos , Percepção/fisiologia , Condicionamento Físico Humano/métodos
4.
Clin J Sport Med ; 30(3): 279-281, 2020 05.
Artigo em Inglês | MEDLINE | ID: mdl-32341293

RESUMO

OBJECTIVE: To identify relationships between self-reported limb preferences and performance measures for determining limb dominance in adolescent female basketball players. DESIGN: Cross-sectional cohort study. PARTICIPANTS: Forty adolescent female basketball players. INDEPENDENT VARIABLES AND MAIN OUTCOME MEASURES: Participants provided self-reported preferred kicking and jumping limbs, then completed 3 trials of a single-limb countermovement hop (HOPVER) and unilateral triple hop for distance (HOPHOR) on each limb. Each test was used to independently define limb dominance by the limb that produced the largest maximum vertical height and horizontal distance, respectively. RESULTS: Chi-square tests for independence identified a significant relationship between self-reported preferred kicking and jumping legs (χ = 7.41, P = 0.006). However, no significant relationships were found when comparing self-reported preference to measures of performance during the HOPHOR (χ = 0.33, P = 0.57) or HOPVER (χ = 0.06, P = 0.80). In addition, the 2 performance measures did not consistently produce the same definition of limb dominance among individuals (χ = 1.52, P = 0.22). CONCLUSIONS: Self-selection of the dominant limb is unrelated to performance. Furthermore, limb dominance, as defined by vertical jump height, is unrelated to limb dominance defined by horizontal jump distance. The results of this study call into question the validity of consistently defining limb dominance by self-reported measures in adolescent female basketball players.


Assuntos
Basquetebol/fisiologia , Lateralidade Funcional/fisiologia , Extremidade Inferior/fisiologia , Adolescente , Fenômenos Biomecânicos , Estudos Transversais , Teste de Esforço , Feminino , Humanos , Autorrelato
5.
Hum Mov Sci ; 70: 102583, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32217201

RESUMO

The aim of this study was to clarify the strategy used by basketball players during free-throw shooting to improve performance in the presence of motor noise. Two possible hypotheses were examined: the players minimize the release speed to decrease signal-dependent noise or the players maximize the shot success probability by accounting for their variability. Eight collegiate players and one professional player participated in this study by attempting shots from the free-throw line using a motion capture system. The solution manifold consisting of ball parameters at release was calculated and the optimal strategy was simulated by considering ball parameter variability; this result was compared with the actual data. Our results showed that participants selected the solution of near-minimum release speed. The deviation of the measured release angle from the minimum-speed angle was close to zero (2.8 ± 3.1∘). However, an increase in speed-dependent noise did not have a significant influence on the ball landing position through simulation. Additionally, the effect of release angle error on the ball landing position was minimum when using the minimum speed strategy. Therefore, the players minimize the release speed to minimize the effect of the release error on performance, instead of minimizing the speed-dependent noise itself. In other words, the strategy is "near-minimum-speed strategy" as well as "minimum-error-propagation strategy". These findings will be important for understanding how sports experts deal with intrinsic noise to improve performance.


Assuntos
Desempenho Atlético/fisiologia , Desempenho Atlético/psicologia , Basquetebol/fisiologia , Ruído , Adulto , Algoritmos , Fenômenos Biomecânicos , Feminino , Humanos , Masculino , Adulto Jovem
6.
PLoS One ; 15(3): e0229212, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32134965

RESUMO

Basketball is a court-based team-sport that requires a broad array of demands (physiological, mechanical, technical, tactical) in training and competition which makes it important for practitioners to understand the stress imposed on the basketball player during practice and match-play. Therefore, the main aim of the present systematic review is to investigate the training and match-play demands of basketball in elite, sub-elite, and youth competition. A search of five electronic databases (PubMed, SportDiscus, Web of Science, SCOPUS, and Cochrane) was conducted until December 20th, 2019. Articles were included if the study: (i) was published in English; (ii) contained internal or external load variables from basketball training and/or competition; and (iii) reported physiological or metabolic demands of competition or practice. Additionally, studies were classified according to the type of study participants into elite (20), sub-elite (9), and youth (6). A total of 35 articles were included in the systematic review. Results indicate that higher-level players seem to be more efficient while moving on-court. When compared to sub-elite and youth, elite players cover less distance at lower average velocities and with lower maximal and average heart rate during competition. However, elite-level players have a greater bandwidth to express higher velocity movements. From the present systematic review, it seems that additional investigation on this topic is warranted before a "clear picture" can be drawn concerning the acceleration and deceleration demands of training and competition. It is necessary to accurately and systematically assess competition demands to provide appropriate training strategies that resemble match-play.


Assuntos
Basquetebol/fisiologia , Aptidão Física/fisiologia , Humanos , Esportes Juvenis
7.
J Sports Sci ; 38(9): 961-969, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32138596

RESUMO

This study examined the effects of lower-body compression garments on perceived recovery and subsequent performance in basketball athletes. In a parallel-group design, 30 recreational, male basketball athletes were randomly allocated to either a control (CON, n = 15, loose-fitting clothing) or experimental group (COMP, n = 15, compression garments) for 15 h following fatigue-inducing, basketball-specific exercise in the evening (1600-1800 h). Perceptual measures of fatigue and muscle soreness, as well as physical performance tests (sprints, jumps and agility), were performed pre-exercise, post-exercise, and post-recovery (15 h following exercise). Subjective and objective measures of sleep were recorded following the exercise trial. There were non-significant (p > 0.05), unclear-trivial differences between groups for all performance measures. Perceived post-recovery fatigue (d = -1.27, large) and muscle soreness (d = -1.61, large) were significantly lower in COMP compared to CON (p < 0.05). COMP exhibited better perceived sleep quality (d = 0.42, small, p = 0.18) than CON, with an unclear difference in sleep duration between groups (p > 0.05). Wearing lower-body compression garments overnight improved perceived fatigue and muscle soreness, but had negligible effects on subsequent physical performance in basketball athletes. Future research should focus on longer periods of compression wear following fatiguing exercise.


Assuntos
Desempenho Atlético/fisiologia , Basquetebol/fisiologia , Fadiga/prevenção & controle , Mialgia/prevenção & controle , Meias de Compressão , Adulto , Basquetebol/psicologia , Humanos , Masculino , Fadiga Muscular/fisiologia , Mialgia/fisiopatologia , Percepção , Sono/fisiologia , Adulto Jovem
8.
J Sports Sci ; 38(9): 1018-1025, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32164498

RESUMO

This study aimed to investigate between- and within-team changes in workload [PlayerLoad (PL), training impulse (TRIMP) and session rate of perceived exertion training load (sRPE-TL)], readiness [heart rate variability (HRV)], and physical performance [20-m sprint test (including 10-m split time), countermovement jump (CMJ) and yo-yo intermittent recovery test level 1 (YYIR1)] during 3-week intensified preparation periods in female, national Under18 (n = 12, age = 18.0 ± 0.5y, stature = 180.4 ± 7.5 cm, body mass = 72.7 ± 9.3 kg) and Under20 (n = 12, age = 19.6 ± 0.8y, stature = 178.6 ± 6.4 cm, body mass = 68.0 ± 5.9 kg) basketball teams. Under18 team revealed small-to-moderate statistically significantly higher values in workload [PL: p = 0.010; ES = Small; TRIMP: p = 0.004; ES = Moderate; sRPE-TL: p < 0.001; ES = Moderate] and moderately lower readiness values (p = 0.023; ES = Moderate) compared to Under20. Within-team analysis showed no differences in workload in Under20 and statistically significant reduction (p < 0.05) in Week3 (taper period) in Under18. Pre- and post-preparation changes showed Under18 increasing only YYIR1 performance (p < 0.001; ES = Very large). Differently, Under20 statistically improved in 10-m split time (p = 0.003; ES = Moderate), CMJ (p = 0.025; ES = Moderate) and YYIR1 (p < 0.001; ES = Large). A constant adequate workload positively benefits players' readiness and physical performances during short intensified preparation periods. Conversely, using high workload with periodization strategies encompassing short overload and taper phases induced positive changes on players' aerobic performance, lower readiness values and no changes in anaerobic performances.


Assuntos
Desempenho Atlético/fisiologia , Basquetebol/fisiologia , Condicionamento Físico Humano/métodos , Adolescente , Comportamento Competitivo/fisiologia , Teste de Esforço , Feminino , Frequência Cardíaca/fisiologia , Humanos , Percepção/fisiologia , Esforço Físico/fisiologia , Carga de Trabalho , Adulto Jovem
9.
J Sports Sci ; 38(8): 886-896, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32122274

RESUMO

Spatio-temporal data in sport is increasing rapidly, however suitable statistical methods for analysing this data are underdeveloped. The current study establishes the need for spatial statistical methods, propose a Bayesian hierarchical model as an appropriate method for comparing spatial variables, and test this model across three spatial scales. The need for spatial statistical methods was established through the identification of spatial autocorrelation. This necessitated the use of a Bayesian hierarchical model to test for an association between spatial ball movement entropy and spatial effectiveness. Posterior distribution results showed a generally positive association such that increases in entropy were associated with increases in effectiveness. The strength and confidence of the associations were impacted by the spatial scale, with the 6 × 6 grid showing the most conclusive evidence of a positive relationship; the 4 × 4 grid was mostly positive, however with a large variation; and finally, the basket-centric scale results were less conclusive. The results of the current study demonstrate the suitability of a Bayesian hierarchical model for testing for associations or differences between spatial variables. With the increase in spatial analyses in sport, this study presents an appropriate statistical method for dealing with complex problems associated with spatial analyses.


Assuntos
Basquetebol/fisiologia , Basquetebol/estatística & dados numéricos , Teorema de Bayes , Entropia , Feminino , Humanos , Movimento , Análise Espacial , Equipamentos Esportivos
10.
J Sports Sci ; 38(8): 928-936, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32138609

RESUMO

A high incidence of overuse knee injuries among youth basketball players may be attributed to number of jumps. Wearable technology may be an effective tool for measuring jump load compared to traditional counting methods. The purpose of this study was to validate a commercially available jump counter (VERT® Classic) in youth basketball practices and games, and to identify the characteristics (i.e., height, direction, takeoff) of jumps recorded by the VERT® Classic. 46 (19F, 27M) youth basketball players wore a VERT® Classic and were recorded on video during games and practices. The number of jumps recorded by the VERT® Classic and evaluated by video raters were compared for each jump characteristic using intraclass correlation coefficient (ICC(3,k)), mean offset, and limits of agreement. The number and percent of VERT® Classic jumps and corresponding video jumps according to timestamp were reported. VERT® Classic jumps had excellent reliability with video-counted jumps over 15 cm (ICC(3,k) = 0.958), with a mean offset of -2.4 jumps (fewer VERT® Classic) and limits of agreement -12.6 to 7.8 jumps. Pairs of corresponding jumps represented 68.0% of total video jumps and 92.0% of VERT® Classic jumps. The VERT® Classic can provide an estimate of jump load in youth basketball.


Assuntos
Basquetebol/fisiologia , Destreza Motora/fisiologia , Dispositivos Eletrônicos Vestíveis , Adolescente , Feminino , Humanos , Masculino , Condicionamento Físico Humano/fisiologia , Exercício Pliométrico , Reprodutibilidade dos Testes , Gravação em Vídeo
11.
J Sports Sci Med ; 19(1): 204-212, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-32132844

RESUMO

Limited research has paralleled concomitant changes in external training load (eTL) and countermovement jump (CMJ) performance. Therefore, this investigation characterized eTL and CMJ performance changes across preseason training in Division 1 male collegiate basketball athletes, while examining the influence of position (Guard vs. Forward/Center) and scholarship status (Scholarship = S vs. Walk-on = WO). During 22 practices, eTL was monitored in 14 male athletes, with weekly CMJs performed to quantify neuromuscular performance (Jump Height [JH], Flight Time:Contraction Time [FT:CT], Reactive Strength Index Modified [RSIMod ]). PlayerLoad per minute was significantly higher during W1 and W2 (5.4 ± 1.3au and 5.3 ± 1.2au, respectively; p < 0.05) compared to subsequent weeks, but no additional differences in eTL parameters across time were observed. Scholarship athletes displayed greater PlayerLoad (S = 777.1 ± 35.6, WO = 530.1 ± 56.20; Inertial Movement Analysis (IMA) IMA_High (S = 70.9 ± 15.2, WO = 41.3 ± 15.2); IMA_Medium (S = 159.9 ± 30.7, WO = 92.7 ± 30.6); and IMA_Low (S = 700.6 ± 105.1, WO = 405 ± 105.0;) (p < 0.05), with no observed differences in eTL by position. Moderate decreases in FT:CT and RSIMod paralleled increased eTL. Significant increases in practice intensity (W1 and W2) did not impact CMJ performance, suggesting athletes could cope with the prescribed training loads. However, moderate perturbations in FT:CT and RSIMod paralleled the weeks with intensified training. Cumulatively, scholarship status appears to influence eTL while player position does not.


Assuntos
Desempenho Atlético/fisiologia , Basquetebol/fisiologia , Destreza Motora/fisiologia , Condicionamento Físico Humano/fisiologia , Bolsas de Estudo , Humanos , Masculino , Fadiga Muscular/fisiologia , Condicionamento Físico Humano/métodos , Estudos Prospectivos , Adulto Jovem
12.
J Sports Sci ; 38(6): 652-657, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32009512

RESUMO

The purpose of this study was to investigate subject- and joint-specific strategies used by male basketball players as they increase their countermovement jump (CMJ) height from sub-maximal to maximal efforts. Lower extremity joint kinematics and kinetics were recorded as 11 male, NCAA Division I basketball players performed 8-10 CMJ across effort levels of approximately 25%, 50%, 75% and 100%. Simple correlation models were used to investigate the associations between effort levels (i.e., CMJ height) and joint mechanics (i.e., negative (eccentric) and positive (concentric) mechanical work performed at the hip, knee, and ankle joints) for each individual player and the entire group. Group-analyses showed that increases in all joint mechanical variables were associated with increases in CMJ height. In contrast, single-subject analyses revealed that players used individualised strategies, and selectively scaled the magnitude of mechanical work at none (n = 2), one (n = 2), two (n = 5), or all three (n = 2) joints as they increased CMJ efforts. In addition, individual players also appeared to selectively scale different combinations of eccentric or concentric joint work as they increased CMJ height. These results highlight that male basketball players use joint-specific strategies to increase CMJ height when progressively increasing CMJ effort.


Assuntos
Articulação do Tornozelo/fisiologia , Basquetebol/fisiologia , Articulação do Quadril/fisiologia , Articulação do Joelho/fisiologia , Exercício Pliométrico , Fenômenos Biomecânicos , Humanos , Cinética , Masculino , Análise e Desempenho de Tarefas , Adulto Jovem
13.
Int J Sports Physiol Perform ; 15(5): 724-730, 2020 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-32015213

RESUMO

PURPOSE: To quantify the sleep/wake behaviors of adolescent, female basketball players and to examine the impact of daily training load on sleep/wake behaviors during a 14-day training camp. METHODS: Elite, adolescent, female basketball players (N = 11) had their sleep/wake behaviors monitored using self-report sleep diaries and wrist-worn activity monitors during a 14-day training camp. Each day, players completed 1 to 5 training sessions (session duration: 114 [54] min). Training load was determined using the session rating of perceived exertion model in arbitrary units. Daily training loads were summated across sessions on each day and split into tertiles corresponding to low, moderate, and high training load categories, with rest days included as a separate category. Separate linear mixed models and effect size analyses were conducted to assess differences in sleep/wake behaviors among daily training load categories. RESULTS: Sleep onset and offset times were delayed (P < .05) on rest days compared with training days. Time in bed and total sleep time were longer (P < .05) on rest days compared with training days. Players did not obtain the recommended 8 to 10 hours of sleep per night on training days. A moderate increase in sleep efficiency was evident during days with high training loads compared with low. CONCLUSIONS: Elite, adolescent, female basketball players did not consistently meet the sleep duration recommendations of 8 to 10 hours per night during a 14-day training camp. Rest days delayed sleep onset and offset times, resulting in longer sleep durations compared with training days. Sleep/wake behaviors were not impacted by variations in the training load administered to players.


Assuntos
Basquetebol/fisiologia , Percepção/fisiologia , Condicionamento Físico Humano/métodos , Esforço Físico/fisiologia , Sono/fisiologia , Adolescente , Feminino , Monitores de Aptidão Física , Humanos , Descanso , Autorrelato , Fatores de Tempo
14.
Nutr. hosp ; 37(1): 160-168, ene.-feb. 2020. tab, graf
Artigo em Espanhol | IBECS | ID: ibc-187587

RESUMO

Introducción: son escasos los trabajos que ofrecen una solución práctica a los requerimientos nutricionales del baloncesto actual. Este trabajo ofrece una propuesta teórico-práctica, basada en una revisión de la literatura de los últimos años. Objetivos: analizar la fatiga que produce un partido de baloncesto y ofrecer una solución práctica para acelerar la recuperación por medio de la alimentación. Métodos: búsqueda bibliográfica en la base de datos PubMed de revisiones bibliográficas de los últimos 15 años y artículos originales de los últimos 5 años. Resultados: el tipo de nutriente y los suplementos alimenticios, así como la cantidad y el momento de su ingesta, son variables fundamentales para acelerar la recuperación. Conclusiones: la alimentación antes, durante y después de un partido o de una sesión de entrenamiento exigente es fundamental para la rápida recuperación del jugador


Introduction: very few works offer a practical solution to understand the nutritional requirements of current basketball. This work offers a theoretical-practical proposal. Objectives: to analyze the fatigue produced during a basketball game and offer a practical solution to accelerate recovery through nutrition. Methods: a search of the PubMed bibliographic database for reviews from the last 15 years and original articles from the last 5 years on basketball. Results: type of nutrient and food supplements are essential for a quicker recovery, in addition to their timing and dose. Conclusions: nutrition before, during and after a game or a high-intensity training session plays a fundamental role in the recovery of the basketball player


Assuntos
Humanos , Basquetebol/fisiologia , Suplementos Nutricionais , Nutrientes/uso terapêutico , Necessidades Nutricionais , Vitamina D , Carboidratos , Nutrientes/classificação
15.
Int J Sports Med ; 41(4): 255-263, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31935773

RESUMO

Basketball activity classification can help document players' statistics, allow coaches, trainers and the medical team to quantitatively supervise players' physical exertion and optimize training strategy, and further help prevent potential injuries. Traditionally, sports activity classification was done by manual notational, or through multi-camera systems or motion sensing technology. These methods were often erroneous and limited by space. This study presents a basketball activity classification model based on Dynamic Time Warping (DTW) and body kinematic measures. Twenty participants, including 10 experienced players and 10 novice players, were involved in an experimental study. The experienced and novice players differed in their years of playing basketball. Four basketball movements, including shooting, passing, dribbling, and lay-up were classified by kinematic measures. The results indicate that the proposed model can successfully classify different basketball movements with high accuracy and efficiency. Specifically, with the resultant acceleration of the hand, this model can achieve classification precision, recall, and specificity up to 0.984, 0.983 and 0.994, respectively. Findings from this study supported the feasibility of using DTW in real-time sports activity classification and provided insights into the optimal sensor placement for basketball activity classification applications.


Assuntos
Basquetebol/fisiologia , Aprendizado de Máquina , Aceleração , Basquetebol/classificação , Fenômenos Biomecânicos , Antebraço/fisiologia , Mãos/fisiologia , Humanos , Masculino , Movimento , Reprodutibilidade dos Testes , Ombro/fisiologia , Estudos de Tempo e Movimento , Adulto Jovem
16.
Int J Sports Med ; 41(4): 242-247, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31935780

RESUMO

This study aimed to examine body composition using dual X-ray absorptiometry (DXA) in male and female NCAA Division I collegiate basketball athletes. Two-hundred ten (male [M]/female [F]=88/122) basketball athletes' total and regional fat mass, lean mass, bone mineral density, and visceral adipose tissue were measured. Athletes were classified as: point guards (M/F=27/34), shooting guards (M/F=18/27), small forwards (M/F=13/18), power forwards (M/F=21/27), and centers (M/F=9/16). ANOVA and Tukey's HSD assessed positional differences by sex. In males, centers and power forwards had greater total fat mass (p<0.025), lean mass (p≤0.001), and visceral adipose tissue (p<0.001) than other positions. Male centers had greater arm and leg fat mass and lean mass than point guards, shooting guards, and small forwards (p≤0.049), and greater arm bone mineral density than point guards (p=0.015). In females, centers had greater total fat mass (p<0.001) vs. other positions and greater total lean mass, arm fat and lean masses, arm and leg bone mineral density, and visceral adipose tissue vs. point guards and shooting guards (p≤0.005). Female point guards had lower total bone mineral density than power forwards (p=0.008). In conclusion, these sex- and position-specific total and regional body composition measurements in collegiate basketball players provide population-specific normative data.


Assuntos
Basquetebol/fisiologia , Composição Corporal , Absorciometria de Fóton , Adolescente , Distribuição da Gordura Corporal , Índice de Massa Corporal , Densidade Óssea , Feminino , Humanos , Gordura Intra-Abdominal/anatomia & histologia , Masculino , Valores de Referência , Estudos Retrospectivos , Adulto Jovem
17.
PLoS One ; 15(1): e0227521, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31905223

RESUMO

The purpose of the present cross-sectional study was to clarify the effects of sport expertise and shot results on the action anticipation of basketball players. Eighty-eight male subjects participated in this study, namely, 30 collegiate basketball players, 28 recreational basketball players and 30 non-athletes. Each participant performed a shot anticipation task in which he watched the shooting phase, rising phase, high point and falling phase of a free throw and predicted the fate of the ball. The results showed that the collegiate players and recreational players demonstrated higher accuracy than the non-athletes for the falling phase but not for the other temporal conditions. Analysis of the shot results demonstrated that for made shots, the collegiate players and recreational players provided more accurate predictions than the non-athletes. These results suggested that the experienced players required a sufficient amount of information to be able to make accurate judgements and demonstrated that the experts' judgement bias for made shots was independent of the temporal condition.


Assuntos
Antecipação Psicológica , Desempenho Atlético/psicologia , Basquetebol/fisiologia , Basquetebol/psicologia , Feminino , Humanos , Masculino , Adulto Jovem
18.
J Strength Cond Res ; 34(2): 559-565, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31985717

RESUMO

Otaegi, A and Los Arcos, A. Quantification of the perceived training load in young female basketball players. J Strength Cond Res 34(2): 559-565, 2020-The purposes of this study were (a) to compare training session, match, and weekly perceived training load (TL) between U15 and U16 female basketball players and (b) within the teams, to assess the relationship between perceived TL and the changes in physical fitness performance during an in-season 9-week period. Twenty-one female players from U15 and U16 female teams from the same Spanish club participated in the study. Before and after the study, players were tested to determine physical fitness performance (using Yo-Yo IR1, countermovement jump, T-Test, and 15 m sprint). Each player declared her perceived exertion (PE) for the whole training session and match using Foster's 0-10 scale. Training week perceived TL was higher for the U16 players than the U15 players; U16 players considered the training and matches to be more difficult. In both teams, the perceived TL of the last training session of the week was significantly lower (Effect sizes = large-very large) than the other sessions. Although substantial negative associations (r = 0.52-0.78) were detected between the changes in physical fitness performance and the accumulated volume, sum of PEs and perceived TL in the U15 players, these associations were unclear in the U16 players. The basketball coaches-periodized training goals are to attain the highest session perceived TLs in the middle of the week and to reduce it considerably in the last training session. The U16 and U15 players accumulated perceived TL in different ways. Although the practice volume was similar in both teams, the older players consider the sessions more difficult. The relationship between the perceived TL and the changes in physical fitness performance varied between teams. Based on our findings, we propose that the PE-based dose-response model should be applied with caution in young female basketball players.


Assuntos
Atletas/psicologia , Basquetebol/fisiologia , Condicionamento Físico Humano/fisiologia , Esforço Físico , Aptidão Física/fisiologia , Adolescente , Fatores Etários , Teste de Esforço , Feminino , Humanos , Masculino , Condicionamento Físico Humano/psicologia
19.
J Sports Med Phys Fitness ; 60(4): 544-551, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31974338

RESUMO

BACKGROUND: Understanding the physical activity, the physiological profile and the repeated sprint bouts (RS) nature of U-19 female basketball during official games could help coaches to plan their training. However, they are not extensively researched, as well as, the ecological validity of the Yo-Yo Intermittent-Recovery Test level-1 (YoYo-IRT1). The aims of this study were to determine: 1) the physical and physiological demands of U-19 elite-female basketball; 2) the relationship between the YoYo-IRT1 and game physical-activity; 3) and the RS nature in U-19 basketball. METHODS: Computerized motion-analysis, heart-rate (HR) and blood lactate concentration [La] were measured in 30 players during eight U-19 games (the play-off stage of Tunisian league). They performed YoYo-IRT1. A RS was defined as a minimum of 3-sprints, with recovery of less than 21-sec in-between any of sprints' set. RESULTS: Players spent ~13%, ~29.2% and ~25.2% of total live-time in high, moderate to low-intensity activities, whereas in-between efforts' recovery corresponded to ~32.6%. They spent ~57% of playing-time in high HR-zone (85-95%HRmax). Players performed an average of 6.4 RS per-player per-game, each bout including 3 to 5-sprints. The mean of sprint duration was 2.1±0.4 sec, with a mean recovery time equal to ~8.8-sec. A significant correlation was also observed between [La] and the time spent in high-intensity activity for the 5-min of play prior to blood sampling (r=0.52, P<0.05). A significant correlation was found between YoYo-IRT1 performance and the %time spent in sprint and total high-intensity activities (r=0.67, P=0.001 and r=-0.72, P<0.001, respectively). CONCLUSIONS: This study showed that U-19 elite-female basketball is a moderate to high-intensity activity, with the Yo-Yo-IR1 test being a good-predictor of physical game-performance.


Assuntos
Basquetebol/fisiologia , Adolescente , Desempenho Atlético , Exercício Físico/fisiologia , Teste de Esforço , Feminino , Frequência Cardíaca/fisiologia , Humanos , Ácido Láctico/sangue , Corrida/fisiologia
20.
Acta Psychol (Amst) ; 203: 103013, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31955031

RESUMO

The head fake in basketball is a deceptive action in sports, where an attacking basketball player gazes in one direction (irrelevant component), but passes the ball to the opposite direction (relevant component). A defending player, who aims to respond to the relevant information displayed by the opponent, faces a situation conceptually similar to well-known interference paradigms (e.g., Stroop task, Eriksen flanker task). Previous research has shown that responses to pass directions are slower and more error prone for head fakes than for direct passes (so called head-fake effect). The head-fake effect depends on participants' ability to focus attention on the relevant stimulus feature. As maintaining this attentional focus conceivably bears on limited capacities, we tested if taxing these capacities by a cognitively demanding concurrent task would change the impact of task-irrelevant information and thus, the size of the head-fake effect. Moreover, we investigated the impact of such a concurrent task on post-conflict control (i.e., the congruency sequence effect). The results show that a concurrent task reduces the head-fake effect, while post-conflict control was unaffected. We discuss these findings with regard to the relationship of working memory processes and selective attention.


Assuntos
Basquetebol/fisiologia , Basquetebol/psicologia , Cognição/fisiologia , Decepção , Movimentos da Cabeça/fisiologia , Tempo de Reação/fisiologia , Adulto , Atenção/fisiologia , Feminino , Humanos , Masculino , Estimulação Luminosa/métodos , Teste de Stroop , Adulto Jovem
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